How to run manual telnet test against a MTA.
Text below in this color is informaton you must type. Everything in italics must be subsituted with the appropriate information.
>telnet hostname_of_distant_end_server 25
Connected to hostname_of_distant_end_server.
Escape character is '^]'.
220 hostname_of_distant_end_server ESMTP USA.NET-SMTA vC8.MAIN.3.27X; Mon, 03 Apr 2006 22:28:55 GMT
250 hostname_of_distant_end_server Hello your_sever_name and IP, pleased to meet you
250 Sender OK
250 Recipient OK (491kDcwdI0252Ms2)
354 Enter mail, end with "." on a line by itself
Subject: This is a telnet test
This is only a test.
250 Mail accepted (491kDcwdI0252Ms2)
Connection closed by foreign host.